Title :
Analytical assessment of multi-user vs. spatial diversity trade-offs with delayed channel state information
Author :
Vicario, Jose Lopez ; Anton-Haro, Carles
Author_Institution :
Centre Tecnologic de Telecomunicacions de Catalunya
Abstract :
In this letter, we explore the combined use of spatial and multi-user diversity in a cellular system where channel state information is subject to delays in the feedback channel. First, we analytically derive the probability and cumulative density functions of the post-scheduling signal-to-noise ratio (SNR) for both a single-input single-output (SISO) and an orthogonal space-time block coding (OSTBC) transmission schemes. Then, we obtain the closed-form expressions of the corresponding average system capacities. By evaluating those expressions, we analytically show that the OSTBC scheme is far less sensitive to delays in the feedback channel
Keywords :
block codes; cellular radio; channel coding; diversity reception; probability; space-time codes; OSTBC transmission scheme; SISO scheme; cellular system; closed-form expression; cumulative density function; delayed channel state information; feedback channel; multiuser diversity; orthogonal space-time block coding; probability density function; single-input single-output; spatial diversity; Base stations; Block codes; Channel state information; Closed-form solution; Delay; Fading; Feedback; Information analysis; Robustness; Signal to noise ratio;
Journal_Title :
Communications Letters, IEEE
DOI :
10.1109/LCOMM.2006.1665119
